Mount Thielsen
Mount Thielsen rises to a peak 9,184 feet above sea level just outside the Crater Lake park boundary, but it's visible from most of the park. It has a unique profile for a mountain in these parts, though it's just another of the Cascade stratovolcanoes. Thielsen actually had a fairly short life as a volcano, popping into existence 290,000 years ago and wearing itself out in a mere 40,000 years. The mountain last erupted 250,000 years ago and is considered extinct. Mount Thielsen's pointy profile owes to the more recent actions of glaciers, which spent the Pleistocene carving the mountain up and carting much of it away.
Mount Thielsen
Mount Thielsen rises to a peak 9,184 feet above sea level just outside the Crater Lake park boundary, but it's visible from most of the park. It has a unique profile for a mountain in these parts, though it's just another of the Cascade stratovolcanoes. Thielsen actually had a fairly short life as a volcano, popping into existence 290,000 years ago and wearing itself out in a mere 40,000 years. The mountain last erupted 250,000 years ago and is considered extinct. Mount Thielsen's pointy profile owes to the more recent actions of glaciers, which spent the Pleistocene carving the mountain up and carting much of it away.